From: Arvinn Løkkebakken (arvinnsandakerveien.net)
Date: Wed Nov 02 2005 - 09:58:38 CST

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Robert Felber wrote:

>On Wed, Nov 02, 2005 at 10:19:52AM -0500, Wietse Venema wrote:
>
>
>>>the heap in many ways. What's next for you?
>>>
>>>
>>Adding anti-spam authentication,
>>
>>
>
>Anything in mind which will help against spam from ISPs like hotmail/msn/yahoo
>(which do have a hard job)?
>
>
>
I almost never receive spam from those ISP's. networks. However I
receive a lot of spam from 0.0.0.0/0 using *hotmail.com, *yahoo.com
etc. as envelope sender. You know these ISPs can't do anything to stop
that, as they are not the originators.

>To ease spam by zombies and "open relays" etc is "easy" *cough*. I see a major
>problem in abused ISPs that offer web-mail etc (and only some magic graphic
>numbers as a treat against spam).
>
>
I'm afraid the only sollution to stop spam is to have all ISPs in the
world to block outbound SMTP from their customers networks and to make
smtp authentication mandatory on all outgoing SMTP servers. The biggest
problem with this approach is that it will hand over too much power to
the providers and the end-users are forced in to a pattern they may not
feel comfertable with.

Arvinn

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